Method of communicating motion and power



(No Model.) 2 Sheets-Sheet 1.

I. HOLDEN. Method of Communicating Motion and Power, 8w.

No. 241,862. Patented May 24,1881

N. PETERS, PMIDLRMIW, Wm D. C.

(No Model.) 2 Sheets-Sheet 2;

- I. HOLDEN.

Method of-Gommunioating Motion and Power, &c. No- 24l,.862- Patented Mav24.1881.

N. PETERS, HMO-Mm WM [5.3.

UNITED STATES PATENT OFFICE.

ISAAC HOLDEN, OF BRIDGEPORT, CONNECTICUT.

METHOD OF COMMUNICATING MOTION AND POWER, 81.0.

SPECIFICATION forming part of Letters Patent No. 241,862, dated May 24,1881.

Application filed June 10, 1880.

To all whom it may concern.

Be it known that I, ISAAC HOLDEN, a citizen of the United States,residing in the city of Bridgeport, in the county of Fairfield and Stateof Connecticut, have invented a new and useful method of communicatingmotion and power from one revolving shaft to another placed parallelthereto and at any convenient distance therefrom, of which the followingis a specification.

The object of my invention is to insure positive isochronism in therotation of two parallel shafts by means of a system of levers and linkswhich communicate power from one to the other shaft, thus obviating theemployment of the usual belts, and chains, and spur and bevel gears.

My invention consists in two parallel shafts and two levers between themhaving a common fulcrum, the said levers being directly or indirectlyconnected, as herein shown and (lescribed,with crank-pins or eccentricsof the said shafts.

Figure 1, in front elevation, represents one practical embodiment of myinvention; Figs. 2, 3, and 4, like views of modifications thereof; andFigs. 5, 6, and 7 are front and side elevations of yet anothermodification of my invention.

The driving-shaft is designated by the letter S, and theparallel shaftto be driven synchronously with and from the said driving-shaft isdesignated by the letter S. The disk, or it might be a crank, W, havingthe crank-pin c, is secured to the driving-shaft S. The disk, or it maybe a crank, W, having the crank-pin c, is connected with the drivenshaft S. The two levers L L have a common fulcrum, P, located betweenthe two shafts S S.

In Figs. 1, 2, and 4, the ends of levers L L are, by links Z l, joinedwith the crank-pins c and c of theshafts' S S. In Fig. 1 I have shownthe arms of the levers and the links of equal length; but in Fig. 2 thearms are shorter than the links, while in Fig. 4 the arms of the leversare shown of different length.

In the modification, Fig. 3, I employ but one of each pair of links Z l,and instead of the links omitted I shape the ends of the lever L toextend through or connect with a suitable guide-block placed loosely onthe said crankpins and so as to turn thereon.

(No model.)

In most instances of my invention I prefer to employ a crank andcrank-pin, as described, with the driving-shaft S; but as an equivalentfor the crank and crank-pin it is obvious that 1 may employ a singleeccentric, E, made broad enough to receive side by side the enlargedeyes or ends of the links 1 l, as in Figs. 5, 6, 7. The links l arejointed with the levers L L by pins p, while the links Z are jointedwith the opposite ends of the said levers by pins 1).

The parts having been connected and'arranged as shown, rotation of shaftS will in]- part precisely the same motion to shaft S, each or bothshafts rotating the same distance in like intervals of time, both shaftsturning exactly in unison or isochrononsly.

Other forms, arrangements, and proportions of my invention may bedevised to suit it to particular situations and purposes, all involvingthe same general idea. The pin P need not be equidistant from thecenters ofthe shalts S S, nor need it be in the straight line joiningthose centers; but wherever the pin P be placed, the crank and each partof the connection on the side of S should bear the same ratio to thehomologous part on the side of S, as the distance or P from the centerof S bears to the distance of P from the center of S. When P is placedout of the line of the centers of S and S, the construction may be madewith bent lovers.

1 do not claim two links connected at opposite ends with cranks andeccentrics of two parallel shafts, nor do I claim a single slotted leverconnected at opposite ends with the crankpins of two parallel shafts,the said lever sliding as well as vibrating on its fulcrum.

I claiin- The two parallel shafts and crank-pins, or equivalents carriedby them, and the two levers mounted upon a common fulcrum, combined.

with links, substantially as described, to join the said levers andcrank-pins, or equivalents, to operate substantially as and for thepurpose set forth.

ISAAO HOLDEN.

Witnesses:

GEO. H. DIMOND, A. STEWARD.

